private void internalSetReference(Widget reference) {
// this.reference = reference;
if (reference == null || reference == RootPanel.get()) {
referenceAdjustLeft = 0;
referenceAdjustTop = 0;
} else {
referenceAdjustLeft =
reference.getAbsoluteLeft() + DOMUtil.getBorderLeft(reference.getElement());
referenceAdjustTop =
reference.getAbsoluteTop() + DOMUtil.getBorderTop(reference.getElement());
}
}
public WidgetArea(Widget widget, Widget reference) {
setLeft(widget.getAbsoluteLeft());
setTop(widget.getAbsoluteTop());
if (reference != null) {
setLeft(
getLeft() - reference.getAbsoluteLeft() - DOMUtil.getBorderLeft(reference.getElement()));
setTop(getTop() - reference.getAbsoluteTop() - DOMUtil.getBorderTop(reference.getElement()));
}
setRight(getLeft() + widget.getOffsetWidth());
setBottom(getTop() + widget.getOffsetHeight());
Element elem = widget.getElement().getOffsetParent();
Element p;
while (elem != null && (p = elem.getOffsetParent()) != null) {
int left = elem.getAbsoluteLeft();
if (getLeft() < left) {
setLeft(left);
}
int top = elem.getAbsoluteTop();
if (getTop() < top) {
setTop(top);
}
int bottom = top + elem.getOffsetHeight();
if (getBottom() > bottom) {
setBottom(bottom);
}
int right = left + elem.getOffsetWidth();
if (getRight() > right) {
setRight(right);
}
elem = p;
}
}